height,weight=eval(input("请输入身高（米）和体重\（公斤）[逗号隔开]:"))
bmi=weight/pow(height,2)
print("BMI数值为：{:.2f}".format(bmi))
who=""
if bmi<18.5:
    who="偏瘦"
elif bmi<25:
    who="正常"
elif bmi<28:
    who="过重"
elif bmi<32:
    who="肥胖"
else:
    who="严重肥胖"
print("BMI指标为：",who)
